// SPDX-License-Identifier: GPL-2.0 // Copyright (c) 2024 Pengutronix, Oleksij Rempel <[email protected]> #include <linux/array_size.h> #include <linux/printk.h> #include <linux/types.h> #include <net/dscp.h> #include <net/ieee8021q.h> /* The following arrays map Traffic Types (TT) to traffic classes (TC) for * different number of queues as shown in the example provided by * IEEE 802.1Q-2022 in Annex I "I.3 Traffic type to traffic class mapping" and * Table I-1 "Traffic type to traffic class mapping". */ static const u8 ieee8021q_8queue_tt_tc_map[] = …; static const u8 ieee8021q_7queue_tt_tc_map[] = …; static const u8 ieee8021q_6queue_tt_tc_map[] = …; static const u8 ieee8021q_5queue_tt_tc_map[] = …; static const u8 ieee8021q_4queue_tt_tc_map[] = …; static const u8 ieee8021q_3queue_tt_tc_map[] = …; static const u8 ieee8021q_2queue_tt_tc_map[] = …; static const u8 ieee8021q_1queue_tt_tc_map[] = …; /** * ieee8021q_tt_to_tc - Map IEEE 802.1Q Traffic Type to Traffic Class * @tt: IEEE 802.1Q Traffic Type * @num_queues: Number of queues * * This function maps an IEEE 802.1Q Traffic Type to a Traffic Class (TC) based * on the number of queues configured on the NIC. The mapping is based on the * example provided by IEEE 802.1Q-2022 in Annex I "I.3 Traffic type to traffic * class mapping" and Table I-1 "Traffic type to traffic class mapping". * * Return: Traffic Class corresponding to the given Traffic Type or negative * value in case of error. */ int ieee8021q_tt_to_tc(enum ieee8021q_traffic_type tt, unsigned int num_queues) { … } EXPORT_SYMBOL_GPL(…); /** * ietf_dscp_to_ieee8021q_tt - Map IETF DSCP to IEEE 802.1Q Traffic Type * @dscp: IETF DSCP value * * This function maps an IETF DSCP value to an IEEE 802.1Q Traffic Type (TT). * Since there is no corresponding mapping between DSCP and IEEE 802.1Q Traffic * Type, this function is inspired by the RFC8325 documentation which describe * the mapping between DSCP and 802.11 User Priority (UP) values. * * Return: IEEE 802.1Q Traffic Type corresponding to the given DSCP value */ int ietf_dscp_to_ieee8021q_tt(u8 dscp) { … } EXPORT_SYMBOL_GPL(…);
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